Methane production from rice cultivation contributes ~1.5% of anthropogenic greenhouse gases. Agreement improves by including both natural and anthropogenic forcings. The drought has been linked to anthropogenic global warming. To empirically link this to anthropogenic global warming is speculative. He was skeptical about anthropogenic global warming. The environmental impacts of anthropogenic actions are becoming more apparent. This amounts to about 30% of anthropogenic all carbon dioxide emissions. Oceans work as a sink absorbing excess anthropogenic carbon dioxide (). Meeting this target would require substantial reductions in anthropogenic emissions. Noise pollution from anthropogenic activities is another major concern for marine mammals. Air pollution may come from anthropogenic or natural sources. David Gelernter "expressed skepticism about the reality" of anthropogenic climate change. A 2013 FAO report estimated livestock were responsible for 14.5% of anthropogenic greenhouse gas emissions. Monthly gamma measurements documented concentrations of radionuclides from natural and anthropogenic sources. For instance, we are now in a period of anthropogenic global warming.