With the development of society, our living conditions have improved, and our world has changed greatly.     1     as for the environment, some problems have appeared together with the social development.

Human activities cause many problems for our planet. For example, sea level has     2     by 15 cm over the past century. The Amazon rainforest level has reduced by 17% in the last 50 years because farmers cut down the trees for     3    . People killed a lot of animals and the     4     of animals has dropped.

The earth’s temperature is     5     than before, and it turns more ice into water, so the oceans and land have changed, too. Some animals and plants couldn’t keep up with the changes, so they disappeared     6    . Unless we change our     7    , our future in a hundred years’ time won’t be hopeful. To solve the problem, we should take action at once. First of all we should choose green     8     to go to work or go to school as much as possible. Next, we should say “No”     9     water and food waste. What’s more, we should build parks to protect some of the land. Trees will be planted in the parks, and those parks also give animals places to live.     10     living environment will be better and greener.

Have you ever heard of the story of Earth Day? Now let me tell you.

Earth Day was started in 1970 by a man     1     John McConnell from the United States. In the beginning, it was held on one day in spring when the day and night are of the same length around the world. Now it is celebrated on April 22nd.   Earth Day is now celebrated all over the world.

Earth Day is a very special, day. It makes all of us think about problems we make for the earth. It is not only a special day in the city where we live, but a day that the whole world     2    .

Some countries have Earth Day celebrations, and some people and groups join in Earth Day projects     3     “Protect Our Home” and “Water for life”.

You can join in one of the projects, or start one of your own. It can be something     4     like planting a tree with your mom, or something large like cleaning up a park with your classmates or friends. You can do almost anything. Try to     5     something you would like to do.

Why do we celebrate Earth Day? Because we have     6     one earth and it is our only home. It is getting very dirty. It is our duty to protect our beautiful home. Earth Day is a day to call on people around the world to save our earth.