Charles, who is an avid environmental campaigner, said he did not want the Duke and Duchess of Cambridge's child to ask him why he had not done more to tackle issues like climate change.
This Morning, ITV, 10.30am-12.30pm, Monday 7th January.
In an interview with presenters Phillip Schofield and Holly Willoughby, which will be broadcast tomorrow, he said:
I've gone on for years about the importance of thinking about the long-term in relation to the environmental damage, climate change and everything else. We don't, in a sensible world, want to hand on an increasingly dysfunctional world to our grandchildren, to leave them with the real problem. I don't want to be confronted by my future grandchild and (have) them say: 'Why didn't you do something?' So clearly now that we will have a grandchild, it makes it even more obvious to try and make sure we leave them something that isn't a total poisoned chalice.
Charles also told the ITV daytime show of his worry about Prince Harry, who is currently serving in Afghanistan.
The Prince of Wales, speaking at Clarence House, said:
If you are a parent or relation to a loved one and that person is away in these incredibly dangerous and challenging circumstances, I know you worry all the time. Certainly every night I worry. But he [Prince Harry] loves doing what he's doing and he's brilliant at it. I constantly meet the families of those who have lost their sons, husbands, brothers or sisters... and I have some understanding at least of what they go through.
Charles spoke as he backed This Morning's You Can Be Heroes Week, which aims to capitalise on the success of the 2012 Olympic and Paralympic Games and create a new army of volunteers across the UK.