TEEN SPENDING

Scientists believe they now have scientific evidence to prove that ecosystems work better when there is greater (631) ________________ of species within them. This biodiversity is being lost, destroying natural mechanisms (632) ________________.

Findings show that (633) ________________ plants and animals is not only reducing our quality of life but actually endangering our very existence. We cut down rich rainforests and replace them with one species (634) ________________, such as pine and eucalyptus. We plough up meadows rich in different grasses and herbs and replace them with one grass, for instance rye or wheat.

When a natural ecosystem is simplified, the basic processes in the ecosystem are altered and even damaged. Without their biodiversity, they are not able to serve as (635) ________________. No longer are they able to absorb the carbon dioxide that is being produced in excess. The result is global warming, caused by the increase in the 'greenhouse effect', and ultimately, or even sooner, there will be a change in the world's climate.

Scientists believe they now have scientific evidence to prove that ecosystems work better when there is greater (631) ________________ of species within them.