根据短文大意和语境选择方框内的单词，并用正确的形式填入空白处（每空填一词），使补全后的短文意思通顺，语法正确，结构完整。

Global warming (全球变暖) is becoming a serious problem to our environment. In the southwest of China, some places used to have         water, but now they are having a serious drought (干旱). In other countries, people sometimes find it’s too hot to fall      in summer.
What should we do to stop global warming? First, we should use more clean energy. Next, we’d better go to work on foot or by bike instead of        a car if possible. Besides, we should recycle bottles, glass and plastic bags. We should also plant more trees. In short, we should form a few    of saving energy in our daily life.
Let’s take actions now to     the earth—our homeland. I believe if everyone can do more for our earth, we will have a better future.