Global warming is one of the most serious problems facing humans and greenhouse gases are the main cause of it. Greenhouse gases are produced not only by industry but also by individuals (个人). People use energy to drive cars, make homes {#blank#}1{#/blank#}(comfort) and grow and transport food. Finding{#blank#}2{#/blank#}(solve) to the problem of greenhouse gases is not only a political subject but an individual one as well.

    Look for ways {#blank#}3{#/blank#}(reduce) energy at home. Turn off electrical appliances (家用电器) that you are not using. Replace your light bulbs with energy-efficient light bulbs.

    Eat locally. A lot of energy{#blank#}4{#/blank#}(use) to transport food over long distances,{#blank#}5{#/blank#}burns much fuel. Much of the same food may be grown on local farms. Shop at your local farmers, market. Plant your own vegetable garden.

Make your house {#blank#}6{#/blank#}eco-friendly one. Put a sweater on to keep warm rather than turning the heating on. Plant a tree to provide shade in summer so you don't have to use an air conditioner.

    Reduce and recycle. Be careful {#blank#}7{#/blank#}the products you buy. Recycle all paper, plastic, glass and aluminum (铝) cans.{#blank#}8{#/blank#} (when) you go shopping, please choose items that come with small packaging and that {#blank#}9{#/blank#}(be) reusable. Use your own canvas bags for shopping instead of plastic or paper bags.

    Be energy-conscious of transportation. Walk, ride a bike {#blank#}10{#/blank#}take a bus instead of driving.

    Starting this September, freshmen at Tsinghua University will have to take swimming courses. They won't receive their degrees until they pass the test{#blank#}1{#/blank#}(success). Exceptions will be allowed for students with certain physical or mental conditions, if{#blank#}2{#/blank#}(prove) by medical staff.

    Actually, viewing the ability{#blank#}3{#/blank#}(swim) as a must for students is not something new to this university. It was a{#blank#}4{#/blank#}(require) in the early 20^th century. Later it{#blank#}5{#/blank#}(drop) due to a rising number of students and a lack of facilities（设施）.

    As for {#blank#}6{#/blank#}new rule, opinions vary greatly. Some students welcome it, saying it's a necessary skill {#blank#}7{#/blank#}can save lives, while others argue that it's not reasonable to link degrees {#blank#}8{#/blank#}swimming ability.

    In response to the negative reviews, Liu Bo, head of the Division of Sports Science, gave the following explanation. {#blank#}9{#/blank#}a water sport, swimming does less harm to joints（关节）and muscles and is helpful in improving students' endurance.{#blank#}10{#/blank#}(consequence) it's beneficial to students in the long run.