Right now， most people's attention is on the COVID﹣19 pandemic. In     1    way， this pandemic is also warning us to protect our planet Earth.

World Earth Day， the international movement aiming     2    protecting and improving Earth's environment， is celebrating its 50th anniversary on April 22. For Earth Day 2020， the theme is climate action.    3    （celebrate） this， the Earth Day Network organized the Great Global Clean﹣up event. The network hoped that this would be the largest volunteer event in history， with people from all over the world    4    （set） up events to remove billions of pieces of trash from green spaces， urban communities and waterways. But due to the current ban on public gatherings and lockdown measures in many affected countries， clean﹣up events     5    （postpone）.

That said， the occasion will still continue in a digital way. "    6    it be coronavirus or our global climate crisis， we cannot shut down.    7    ， we must shift our energies and efforts to new ways to mobilize （动员） the world to action. " said Earth Day Network President Kathleen Rogers.

While the event may not reach its originally     8    （plan） grandeur（宏大）， Earth Day 2020 could play a role in helping us sustain     9    （environment） friendly changes， such as practices like teleworking and video conferencing     10    have become more prevalent （普遍的） in this time.

As we all know, the temperature of the earth has risen. That probably does not seem much to you or me, but it is a rapid increase when     1    (compare) to other changes. There is no doubt     2    it is human activity that has caused this global warming rather than a random but     3    (nature) phenomenon.

Some byproducts of the burning of fossil fuels are called “greenhouse” gases, the most important one of which is carbon dioxide. More heat energy tends to be trapped in the atmosphere     4    (cause) the global temperature to go up.

Some scientists accept the idea that the problem begins when we add huge    5    (quantity) of extra carbon dioxide into the atmosphere. However, some scientists are opposed     6     this view and believe that we should not worry about high levels of carbon dioxide in the air.

Everyone knows, the global warming connects the nature. In the text The Power of Nature, we are also aware that the writer has an exciting job.     7    (collect) and evaluated the information, the writer helps other scientists to predict where lava from the volcano will flow next and how fast. His work has saved many lives because people in the path of the lava can be warned to leave    8    (they) houses.     9    (fortunate), they cannot move their homes out of the way, and many houses have been covered with lava or burned to     10     ground.

A small town in England is teaching the world that it is important     1    (grow) your own food. Any open space     2    (use) to grow fruit and vegetables. There are apples, pears, peaches, strawberries, cabbages and carrots, here and there. Everyone can pick them     3     free. Eight years ago, a woman named Pam in Todmorden dug up her rose garden. She planted vegetables, knocked down the garden wall and put up a sign     4    (say), “Help yourself?” Today, Pam has     5    (complete) changed the town. A new town has been born,     6     is called “Incredible Edible Todmorden”. Pam explained why she thought the idea was popular. “It’s possible and positive. Many people know we have to change,     7     how we do that is a question. So one day, she gathered all the     8    (villager) together. They decided to do something different at once. They didn’t write reports. They didn’t ask for permission. They just did it. Only a short time     9    (late), Todmorden became a big garden of fruit vegetables. In Todmorden, there is a motto: If you eat, you are in. But that’s not all. There are     10    (many) than 700 edible towns popping up around the world, from Canada to Mali. People there think about food and protect environment at the same time.