And many who formerly had not contributed much to achieving a global agreement – to put it mildly – have now become warm advocates of such an agreement.
A conservative think tank that has been a long time anti-global warming advocate, their webpage offers a September 2015 updated report, "Global Warming: Not a Crisis": The important questions from a public policy perspective are: How much of the warming is natural?
Though Mr. Gore, who has written a book on global warming, was considered a strong advocate for the environment before 1993, many environmentalists have expressed disappointment with the administration's environmental record over the last seven years.
The bill failed, but only by 12 votes - a victory of sorts for global warming advocates.
He presciently raised the specter of global warming, advocated for safer cars and championed equal rights and recognition for women, especially his wife.
But toward the end of the year, as Mr. Wei was sent to exile and Chinese-American relations warmed, advocates sensed a slight easing of controls.
Other global warming advocates argue that a return to conditions similar to the MWP would not be a benefit to all, as temperature increases might make some regions more pleasant and prosperous while reducing agricultural productivity in others.
It is hard to imagine today even the warmest advocates of intervention cheerfully accepting the casualties required for the liberation of Tibet or Chechnya, or the removal of Myanmar's election-defying junta (though tomorrow's advances in high-tech warfare may change those calculations).
In contrast, some global warming advocates maintain that analysis of the MWP adds little to the climate debate, since the climate variability of the interval can be explained by changes in large-scale climate patterns, such as El Niño/Southern Oscillation (ENSO) and the NAO, rather than by changes brought on by human beings.
