Презентация на тему по английскому языку на тему Pressing problems(2 курс)

there are local problems due to the production of

smoke and offensive gases by factories.

agglomerations
which may spread the same harmful effects over

whole areas.

as those arising from nuclear explosives, which cover

a considerable portion of the globe.

of pollution which is threatening the globe as a

whole.

of ozone around our planet is under severe attack.

researchers in the Antarctic first identified a yawning hole

over the Antarctic where the ozone layer is thinnest.

ozone layer is believed to be the increasing
amount of

harmful chemicals that are being released into the atmosphere by humankind.

one per cent drop in the overall ozone layer

can cause an increase of skin cancer.

intensified the search for a cause. Strong evidence now

suggests that it is the growing industrial use of chlorine compounds called chlorofluorocarbons (CFCs) which is responsible. CFC is a propellent gas commonly used in aerosol sprays, air cooling systems in fridges and air-conditioning.

the atmosphere
is actually increasing by 5 per cent each

year.

3 pen cent over the densely populated cities of

the US,

Canada and Europe and by 4 per cent over Australia and New Zealand.