The phenomenon of A atmosphere heating up is known as climate change (or global warming).

Scientists believe that human activity has caused the Earth to warm by around 1 °C B the Industrial Era. Although this does not seem like much, it has significant implications for humans and animals all around the world.

Unfortunately, rising temperatures do not always imply improved conditions! Our weather will get C severe and erratic as a result of the changing atmosphere.

Climate change is now having an effect on nature around the world, with some animals struggling more than others. Polar bears, whose frozen natural environment D as a result of the temperatures, are particularly vulnerable.

Climate change E only affect animals; it is also having an effect on humans. When temperatures increase, certain regions may become drier, and many animals (and humans!) will be unable to adapt to their changing environment.

A. 1) ours; 2) our; 3) us; 4) ourselves.

B. 1) to; 2) during; 3) since; 4) for.

C. 1) more; 2) much; 3) many; 4) plenty of.

D. 1) melts; 2) has melting; 3) is melting; 4) melted.

E. 1) would not; 2) will; 3) would; 4) will not.