However, earlier this month, researchers from Durham University's Energy Institute reported that fracking was not a significant source of tremors that can be felt on the surface, compared to many other human activities such as mining or filling reservoirs with water.

BBC: Lancashire election candidates asked to oppose fracking

The interconnections between water and climate are complex and not isolated from other forces, pressures and opportunities generated primarily by human activities.

UNESCO: Social and Human Sciences

It is likely that lower taxes would also stimulate increases in research and development and other inventive activities, increase entrepreneurship, increase the accumulation of human capital, lead to more immigration of high-skilled workers, and encourage foreign firms to locate in the United States.

WSJ: Thomas F. Cooley and Lee E. Ohanian: The Bush Tax Cuts Never Went Far Enough

Finally, crossbench peer Baroness Coussins asked the government whether its discussions with the President of Colombia during his visit included monitoring human rights and environmental impacts of British and other multi-national corporations engaged in mining activities in Colombia.

BBC: Peer calls for 'closure' over Lockerbie

One is the realisation that many human activities, not all of them savoury, happen for exactly the same reasons as in other species.

ECONOMIST: The proper study of mankind