The issue is not with the science that he's quoting - the bulk of the criticism comes from what he's quoting, ie. it's pretty selective, and that in some cases

The issue is not with the science that he's quoting - the bulk of the criticism comes from what he's quoting, ie. it's pretty selective, and that in some cases he's been found to be quoting the lower edge of a range, rather than giving an accurate indication of the science.