Blair in US for meeting with Bush

Prime Minister Tony Blair is in the US visiting President George Bush to talk about Africa and the environment.

The pair are chatting before the G8 summit in Scotland in July where they will meet up with other world leaders.

They are expected to make a statement about helping Africa after the talks, although the US isn't expected to go as far as the UK in increasing aid.

At the same time a number of the world's top scientists have asked the leaders to do more on climate change.

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Scientists from all the G8 countries, as well as Brazil and China want countries to stop producing the gases that causes global warming.

The US hopes its scientists can come up with a way to use technology to solve the problem instead.

The UK chancellor Gordon Brown is trying to get countries to agree to double the money they give to Africa, but the US government is not thought to support that plan completely.

Mr Brown wants to double aid and get rid of the debt Africa owes the world's banks, while the US is happy to get rid of the debt, but may want to give less aid in future if it does so.