перевод: For millions of years layers of gases have kept the

перевод: For millions of years layers of gases have kept the earth warm enough so that people plants and animals can live here.but some scientists are now concerned that the earth surface will warm up too much to a dangerous degree.this is called global marning . factories cars and other things are making lots of new gaes . even when we electroty we help to put greenhouse gases into the air .these gases. are trapping mone and mone of the sun heat . if it gets too hot weather all over the globale will change warm caces will be too hot live in and cold places will become warm .polar icecaps could mealt which would make the sea level unusally high and cold result