1Ans:-The key aim of environmental protection is to prevent the degradation of the natural environment which is affected by increasing population, technology and overconsumption, all of which have created a negative impact on the environment and continue to put humans and animals at risk. 2 Ans:-Pollution. ... Global warming. ... Overpopulation. ... Waste disposal. ... Ocean acidification. ... Loss of biodiversity. ... Deforestation. ... Ozone layer depletion.