Global Warming

We've already started feeling the [adverse:negative] effects of global warming. Forests have been [devastated:destroyed] due to the rise in population of pine beetle which expanded due to the lack of severe winters. Forests are also at a high risk of catching fires. There has been a [four:five] fold increase in forest fires. The amount of carbon [dioxide:monoxide] released due to these bog fires has resulted in fuel combustion. It is been observed that over the past couple of [decades:years] , birds and butterflies have shifted their range northward by 200 kilometers in Europe and North America. Global warming has also had a devastating effect on health. The incidence of cardiovascular diseases has increased due to increased [ozone:fluorocarbons] in the atmosphere. Lung tissues are damaged leading to asthma. Hence, the [mortality:fatality] rate too has been affected. This global warming has led to a higher rate of dengue and malaria cases. These insect borne diseases are on the rise and the World Health Organization is working hard to [eradicate:eliminate] them through vaccines.