prepositions

[akbar]

I am not sure if the prepositions are correct in this paragraph. Pls check it soon…
There are millions (of) factories and millions (of) cars (on) our planet. These cars and factories cause air pollution. Pollution is causing the temperature (of) earth to rise. (During) the twentieth century, the average temperature (on) the earth increased (at) .6c. Temperatures may go up (by) four more degrees in the next fifty years. The ice (on) the north poles and south poles may start melting which will cause water level (in) the sea to rise. the sea might then cover many parts (of )the earth.

[Casiopea]

Great try. Check out the underlined words:

There are millions (of) factories and millions (of) cars (on) our planet. These cars and factories cause air pollution. Pollution is causing the temperature (of) earth to rise. (During) the twentieth century, the average temperature (on) the earth increased (at) .6c. Temperatures may go up (by) four more degrees in the next fifty years. The ice (on) the north poles and south poles may start melting which will cause water level (in) the sea to rise. the sea might then cover many parts (of )the earth.

[akbar]

Great try. Check out the underlined words:

during the twentieth century the average temperature on the earth increased (to / by)

[Casiopea]

. . . increased to 6C? Brrrrr. That's pretty cold. Brrrr.

[akbar]

Great try. Check out the underlined words:

Originally Posted by akbar
There are millions (of) factories and millions (of) cars (on) our planet. These cars and factories cause air pollution. Pollution is causing the temperature (on) earth to rise. (During) the twentieth century, the average temperature (on) the earth increased (by) .6c. Temperatures may go up (by) four more degrees in the next fifty years. The ice (at) the north poles and south poles may start melting which will cause water level (in) the sea to rise. the sea might then cover many parts (of )the earth.
now everything is o.k. i am so tired with hard try. be kind......

[Casiopea]

Looks great. Well done.