Industrial nations' CO2 targets too weak - experts

* Industrialised nations' CO2 cuts just 10-14 pct vs 1990

* Russia 2020 goal could add to CO2 pressures

* Not enough to avoid "dangerous" climate change-UN chief

By Alister Doyle and Gerard Wynn

OSLO/LONDON, June 22 (Reuters) - Pledges by industrialised nations to cut greenhouse gas emissions by 2020 fall far short of the deep cuts widely advocated for tackling global warming, experts said on Monday.

Russia, the world's number three greenhouse gas emitter mainly from burning fossil fuels, on Friday said it would limit emissions to 10-15 percent below 1990 levels by 2020, becoming the latest major industrialised nation to state its target.

Overall emissions cuts promised by industrialised nations in the run-up to a new U.N. climate pact due to be agreed in Copenhagen in December now average between 10 and 14 percent below 1990 levels, according to Reuters calculations.

"These are very weak targets overall," said Knut Alfsen, research director of the Center for International Climate and Environmental Research in Oslo.