There is limited evidence to suggest that an increase in carbon dioxide would be beneficial for plant growth, in the long term. Carbon dioxide is rarely the limiting factor for natural plant growth. The consensus that humans are causing recent global warming is shared by 90–100% of publishing climate scientists according to six independent studies by co-authors of a 2016 paper. Those results are consistent with the 97% consensus reported by Cook et al based on 11 944 abstracts of research papers, of which 4014 took a position on the cause of recent global warming. A survey of authors of those papers also supported a 97% consensus. Climate change is likely to stimulate the development of harmful cyanobacterial blooms in eutrophic waters, with negative consequences for water quality of many lakes, reservoirs and brackish ecosystems across the globe. Air pollution needs to be addressed as visible threat. A total of 54 000 and 27 500 premature deaths can be avoided by a 20% reduction of global anthropogenic emissions in Europe and the US, respectively . A 20% reduction of North American anthropogenic emissions avoids a total of ∼ 1000 premature deaths in Europe and 25 000 total premature deaths in the US. A 20% decrease of anthropogenic emissions within the European source region avoids a total of 47 000 premature deaths in Europe. Reducing the east Asian anthropogenic emissions by 20% avoids ∼ 2000 total premature deaths in the US. These results show that the domestic anthropogenic emissions make the largest impacts on premature deaths on a continental scale, while foreign sources make a minor contribution to adverse impacts of air pollution. However, the results of the study are not based on CO2 emissions. Air pollution already costs a lot. In the entire Medicare population, there was significant evidence of adverse effects related to exposure to PM2.5 and ozone at concentrations below current national standards. This effect was most pronounced among self-identified racial minorities and people with low income. Generally, global past and planned land usage of the Earth is not with the view of helping plants grow. Much of the Earth's biodiversity is facing extinction due to human activity all while has been rising.
