Here's a selection of festivals for tourists to the United States in summer.

    San Francisco Silent Film Festival

    Films at this odd cinematic event have a variety of musical accompaniments,including piano and violin.It includes some classic silent movies.If you want to see them all,you can buy a festival pass.

    May 29 to June 1; www.silentfilm.org

    Union Street Festival

    This popular street fair stretches out over six blocks of the city,in the fashionable shopping area of Union Street.This year,there's beer,wine tasting and more separate themes—fashion,cuisine,tech,local,craft,and health and fitness.

    June 7 to 10; www.unionstreefestival.com 

    North Beach Festival

    This is San Francisco's oldest street party,with live entertainment,delicious food and arts and crafts.Situated in the Little Italy district,known for its associations with the "Beat Generation",festival goers are guaranteed plenty of good Italian food.There is also as the “blessing of the animals”,a San Francisco tradition which takes place at the National Shrine of Saint Francis of Assisi (610 Vallejo Street) at 2 pm on both days of the festival.

    June 14 to 16; www.sfnorthbeach.org

    Stern Grove Festival

    This is the oldest free summer arts festival of its kind in the United States.It includes a wide variety of acts,from the local symphony orchestra to well known artists such as Smokey Robinson.

    Sundays from June 22 to Aug 24; www.sterngrove.org

    What do you think of cats? Some people think very lovely. But not all people love cats. Compared with dogs, cats seem to be very lazy and unfriendly. Besides, cats are not known for acts of selflessness (无私). But maybe we're wrong about them. Don't believe it? Then meet Pippa, a very unusual cat.

    The black-and-white cat was left in a box outside a shop and taken by the British RSPCA to the Jansa family in Whitstable, Kent. They really loved her character (性格) and decided to adopt (收养) it，but they never guessed she'd become a lifesaver.

    Eight-year-old Mia Jansa had diabetes and had become good at testing her blood during the day, as well as having something to eat or drink to bring her blood sugar levels back. But the danger was at night. Mia could easily experience hypoglycemic (低血糖症的) situations when she was asleep, which could cause even death.

    Soon after she was adopted, Pippa went into Mia's bedroom in the middle of the night and woke her up. When the child tested her blood sugar levels, she found they were dangerously low. Ever since, Pippa always visits Mia at night. If she can't get her to wake up, she raises the alarm.

    “Pippa does this of her own accord,” says Mia's mother Laura. “We don't make a request for caring because we don't want to encourage wrong alarms. She gets plenty of hugs. It gives me peace of mind and I know someone else is keeping an eye on Mia.”

    Now the family is so happy that they've chosen to adopt it in the first place.

    We all know that water is tasteless. But it happens from time to time: you pick up the bottle of water you didn't finish yesterday, and it tastes strange. Most often, you tend to drop the bottle in the trash bin, believing that the water has gone bad. But is it true?

    According to Time, of course not, taste has little to do with quality of water.

    According to Time, when water is exposed to the air for 12 hours, carbon dioxide interacts with the H2O in the water, and the pH value lowers slightly. As a result, the water has a different taste.

    "But it's most likely safe to drink," Norwegian expert Truls Krogh told Science Nordic. "If the water is covered and of good quality to start with, in principle it can last a thousand years. That's because when water is fresh, it contains little organic matter. As long as water is held in clean glasses or bottles, no pollutants will enter it to harm our health."

    People in countries like the US, the UK and Australia usually drink tap water. According to Time, if tap water is drunk within six months, the chlorine (氯气) in the water will be enough to kill any bacteria and keep it safe to drink.

    However, there are also some exceptions. If you accidentally put your fingers into water or store water in unclean containers day after day, microorganism (微生物) will enter the water.

    With the help of surrounding temperature, and sunlight streaming through windows, these microorganisms multiply quickly. Sooner or later, the water will be in the charge of the unfriendly bacteria. And if you drink the water too often, then you're more likely to be ill.

    And what about water in plastic bottles? Heat and plastic are a bad combination, US researcher Kellogg Schwab stresses. When plastic bottles are used at high temperatures, they produce a chemical called BPA. BPA is something that affects hormones (荷尔蒙) and research has tentatively linked it to "several health damage, including heart disease and cancer", Time reported.

    Schwab suggests replacing disposable (一次性的) plastic bottles with the refillable containers made of metal or glass to deal with BPA.

    Food is necessary for offering energy to our bodies, but sometimes we buy too much of it at the store. When your food starts to go bad, there are many other ways you can still make use of it instead of throwing it away.

    Before throwing away old bananas, you can use the peels (皮) to shine up metals and leathers. Press the peel against the surface, move it backwards and forwards and then polish clean it with an old cloth. Banana meat is also good for reducing wrinkles. Put a bit on those trouble spots, let it sit for a while, and then wash it off, and your wrinkles will go away. Lemons are great for lightening skin and hair. If you have trouble with some skin diseases, like red spots on your face, put a bit of fresh lemon juice on them and leave it overnight. You'll notice a difference in the morning. Apples will help ripen (使成熟) tomatoes quickly when they are placed together in a paper bag, and orange peels are great fire starters for your next backyard campfire party.

    If your dog or cat brings home fleas, using salt is a great way to get rid of them around the house. Just pour salt into the vacuum cleaner (真空吸尘器). Let it sit, then vacuum up the fleas. The salt can kill the fleas. Be sure to throw away the vacuum bag or empty the vacuum bin immediately, or some of the fleas can climb out.

    Beer is a great hair lightener. If you are out of lemons, try dipping your hair in beer before going outside. Just don't forget to wash it out afterwards. Milk is great for removing dirty marks, especially if it is some type of ink.

    As you can see, there are many other uses for everyday foods around the house. So next time, before throwing food away thinking it is of no use, stop for a moment and think about all their uses talked about here.

    Amsterdam is one of the most popular travel destinations in the world, famous for its beautiful canals, top art museum and cycling culture. It is the capital and most populous (人口稠密) city in the Netherlands and often referred to as the "Venice of the North" due to its convenient system of bridges and canals. Here are some of the key points to remember as you plan your trip to Amsterdam.

    Must-See Attractions

    Most visitors begin their Amsterdam adventure in the Old Centre, which is full of traditional architecture, shopping centers and coffee shops. Don't miss the Dam Square and the areas around Spui and Nieuwmarkt. You'll also want to check out Amsterdam's Museum Quarter in the South District, which is great for shopping at the Albert Cuyp Market and having a picnic in the Vondelpark.

    Transportation

    Travelers should be aware that Amsterdam Airport Schiphol is one of the busiest airports in the world. You can catch a train from Schiphol to Amsterdam Central Station, which has many connecting routes. Cycling is very popular here, and it's easy to find cheap bike rentals around town.

    Recommended Restaurants

    Amsterdam is a top destination for foodies (美食家), so it is difficult to narrow down your dining choices. Here are a couple of our favorites.

Money Saving Tips

    • Unless you really want to see the tulips (郁金香) blooming, avoid booking between mid-March and mid-May. This is when hotel and flight prices rise sharply.

    • Look for accommodations in Amsterdam's South District, where rates are generally cheaper than in the city center.

    • Buy train tickets at the machine instead of the counter to save a bit of money.

    • Check out our homepage to view price comparisons for flights, hotels, and rental cars before you book.

    So you're thinking about breaking up with me. But before doing that, make sure you have examined its short-term and long-term environmental effects.

    Let's start simple: consider the great number of gallons of clean, drinkable water that would be wasted by my crying in the shower. Scientists don't have a precise estimate of how much water might be lost, but, considering the length of my listening to the recent two sad albums during the shower, the amount is sure to be catastrophic.

    Make no mistake: running from my sweet hug leaves a set of carbon footprints. Your leaving me will start a swift chain of events that results in me at a bar, drunkenly cursing at you with my friends.

    At the end of the night, I will be forced to take a taxi home instead of the subway. Those extra carbon dioxide releases are a breakup by-product, as are the single-use plastic bottles of Glacier Freeze-flavor Gatorade I'll surely buy the next morning.

    Some effects are more hidden. Should you kick me to the roadside, you must anticipate that I am going to sit there eating ice cream. I will eat ice cream a lot every day, because I have seen sad women do this in movies. This, of course, causes ecological disaster. Not only do dairy cows produce greenhouse gas, but industrial dairy farming can cause the destruction of prairies (北美草原) forests, and other ecosystems. You might meet other interesting women in your life, but good luck is replacing North America's wetlands!

    Breaking up with me is a very personal choice, and no one can make it for you. I only hope that you have gained a helpful new way of thinking, one broad enough to deal with the world that waits for you in your single-hood. There might be "other fish in the sea," but will there be actual fish in the real sea? It doesn't look good. Alternatively, we could stay together and preserve this beautiful blue sea for our grandchildren. The Intergovernmental Panel on Climate Change and I eagerly wait for your decision.