Net Zero Future? Here''s How. The world seems to be racing against time to achieve zero emissions by 2050. Already, a growing coalition of more than 70 countries, including the biggest polluters — the United States, China and the European Union — has pledged and set a net-zero target, covering about 76% of global emissions . As put by the United Nations , net-zero means cutting greenhouse gas emissions to as close to zero as possible — with any remaining emissions re-absorbed from the atmosphere by oceans and forests. To reduce carbon emissions by 45% by 2030 and reach net zero by 2050, experts recommend replacing fossil fuel energy sources like oil, gas and coal with renewable energy sources like solar and wind. The energy sector could help avert the adverse effects of climate change because it contributes about three-quarters of greenhouse gas emissions today. Recommendations for a shift toward renewable energy could create opportunities for companies like NRG Energy Inc. (NYSE: NRG ), UGI Corp. (NYSE: UGI ) and Viking Energy …