Britain's independent advertising watchdog agency has criticized a government ad campaign that highlights the dangers of climate change.

An Advertising Standards Association spokesman says nearly 1,000 complaints about the ads have been received.

The government campaign is based on the children's poems "Jack and Jill" and "Rub-A-Dub-Dub."

Spokesman Matt Wilson said Monday that many of those who complained found the ads would be distressing to children. He said many also objected to the implication that climate change is caused by human activity.

The watchdog agency believes the ads exaggerate the threat Britain faces as the planet heats up. It says uncertainties about climate change were not taken into account.