BRUSSELS (Reuters) -The European Commission is set to propose counting carbon credits bought from other countries towards the European Union's 2040 climate target, a Commission document seen by Reuters showed. The Commission is due to propose a legally binding EU climate target for 2040 on July 2. An internal Commission summary of the upcoming proposal, seen by Reuters, said the EU would be able to use "high-quality international credits" from a U.N.-backed carbon credits market to meet 3% of the emissions cuts towards the 2040 goal.