US President George W. Bush has said that any international agreement on climate change can not be effective without full participation of major economic powers like India and China. "How can you possibly have an international agreement that's effective unless countries like China and India are not (sic) full participants," Mr Bush said. The issue of climate change came up during his meeting with visiting South Korean President Lee Myung-Bak at Camp David. "And that's why I assured him (Lee) this major economies meeting that is taking place in Paris, I assured him... That hopefully by the time we get to G8 there's a serious effort by all major economies to become active participants in a effective strategy to deal with this issue," Mr Bush said at a joint press conference with Mr Lee. Mr Bush said they discussed the issue and agreed to take a rational approach on it. "We talked about our mutual desire to have a rational, practical approach to the international climate issue, global warming," Mr Bush said. On Thursday, Mr Bush had announced a timeline of 2025 for the US to curtail emissions which contributed to the climate change. "Countries like China and India are experiencing rapid economic growth and that's good for their people and for the world. This also means that they are emitting large quantities of greenhouse gases which has consequences for the entire glob al climate," Mr Bush had said. US President George W. Bush has said that any interna- tional agreement on climate change can not be effective without full participation of major economic powers like India and China. "How can you possibly have an international agreement that's effective unless countries like China and India are not (sic) full participants," Mr Bush said. The issue of climate change came up dur- ing his meeting with visiting South Korean President Lee Myung-Bak at Camp David. "And that's why I assured him (Lee) this major economies meeting that is taking place in Paris, I assured him... That hopeful- ly by the time we get to G8 there's a serious effort by all major economies to become active participants in a effective strategy to deal with this issue," Mr Bush said at a joint press conference with Mr Lee. Mr Bush said they discussed the issue and agreed to take a rational approach on it. "We talked about our mutual desire to have a rational, practical approach to the international cli- mate issue, global warming," Mr Bush said. On Thursday, Mr Bush had announced a timeline of 2025 for the US to curtail emis- sions which contributed to the climate change. "Countries like China and India are experiencing rapid economic growth and that's good for their people and for the world. This also means that they are emit- ting large quantities of greenhouse gases which has consequences for the entire global climate," Mr Bush had said.