Christmas is a season to spread joy. Can we spread this joy by caring a little more about

Christmas is a season to spread joy. Can we spread this joy by caring a little more about nature and going green? Here are some good ideas.
Reduce the use of the decorative(装饰) lights. Make use of the eco-friendly（环保的）lights on the market. In this way you can save electricity.
Reuse the wrapping (包装)paper to wrap the gifts. You don’t need to buy new wrapping paper every year. Also try using the same small decorations for your Christmas tree.
Recycle(循环利用)all those decorations that your can not use any more. You can send out Christmas cards made from recycled paper. It’s a thoughtful way of going green for Christmas.(1)There are many charities selling these cards made from recycled paper.
There are some other ideal ways to go green for Christmas.
(2)You can      Christmas gifts by     .You needn’t go to shops to buy presents for your family and friends. Homemade Christmas chocolates, handmade soft toys, homemade candles are wonderful.
If you have no time for gifts, you can also invite your family and friends over to have a home cooked meal. They can even help you with the cooking. This can make your relationship stronger.
Let’s use these green Christmas ideas to celebrate an eco-friendly Christmas!
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3.回答问题：Why do we use the eco-friendly lights for Christmas?
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