Plus: Canada and the European Union strike back at Trump tariffs. | EPA will roll back regulations on power plant emissions and tailpipe pollution.

John Holdren delivered these remarks as part of his keynote address at last Friday's 'Stand Up For Science' rally in Woods Hole.

In her first three years in the job, an average of 16,000 public sector posts a year were scrapped. Between 1979 and 1983, ...