He was speaking as France and Germany stepped up efforts to show they were working to tackle the problem, seen as a key element in flagging support for EU institutions and the continent's political leadership.
Mr Hoon said today: "Cutting road transport CO2 emissions is a key element to tackling climate change.
Community action has been considered a key element in tackling the health disease process and health promotion among populations since the International Conference at Alma-Ata in 1978. 1 Its importance has been further emphasised in several international conferences.
Home Secretary Theresa May added that long-term funding for rape crisis centres was "a key element of the government's wider strategy to tackle violence against women and girls".
Designing low-carbon urban transport systems is a key element in realising low-carbon cities for tackling the climate change issues on an urban scale.
Moisture is a key element to consider.
"Cattle vaccination is also a key element.
This is a key element of integrity.
We know that genetics are a key element.
That's a key element of our marking technology.
