claim: "His [Dr Spencer's] latest research demonstrates that – in the short term, at any rate –  the temperature feedbacks that the IPCC imagines will greatly amplify  any initial warming caused by CO2 are net-negative, attenuating the  warming they are supposed to enhance.
evidence: However, the long-term trend is for the plant life on land to die off altogether as most of the remaining carbon in the atmosphere becomes sequestered in the Earth.