欧盟委员会提出具有法律约束力的2040年气候目标，在1990年的水平基础上减少90%的净排放量。

Core Points - The European Commission has proposed a legally binding climate target for 2040, aiming to reduce net emissions by 90% compared to 1990 levels [1] Group 1 - The target set by the European Commission is significant as it establishes a clear and ambitious goal for emissions reduction [1] - This proposal reflects the EU's commitment to addressing climate change and transitioning to a more sustainable economy [1] - The legally binding nature of the target indicates that member states will be required to implement policies to achieve these reductions [1]