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As Representative David Hobson ( R-OH ) said recently as Chair of the House Energy and Water Development Appropriations Subcommittee , " I find it really hard to conceive of any circumstances under which this country would even use a nuclear weapon again whether or not the weapon is low-yield , whether or not it is a more robust version of an existing weapon and whether or not it would be used against a hard and buried target . The BBC ’ s Climate Chaos series is being supported by household names such as Sir David Attenborough , Sir David King stated that ‘ climate change is the most sever threat we face ’ and Mikhail Gorbachev warned that we could see ‘ real conflicts ’ over basic resources such as water . As Dr David Munro , Director of the Royal Scottish Geographical Society , says in his new Foreword , ' it has all the elements of a tale of high adventure , describing as it does the rigours of life at sea , the trials of overwintering in Antarctica , and the highs and lows of morale ebbing and flowing with the icy waters of the South Atlantic ' . As Henry David Thoreau told us , " In wildness is the preservation of the world . '' But , as Professor David Dill observes , `` I 'm not concerned with elections that are a mess . This change in mood was captured in the writing and paintings of 19th century travellers such as Henry David Thoreau .