Nearly 38% of Americans between the ages of 18 and 29 agreed that climate change should be a factor in a couple’s decision about whether to have children. And 34% of Americans between the ages of 30 and 44 agreed.

Agreement was also linked to the belief that climate change is man-made: 38% of respondents who said “the earth is getting warmer mostly because of human activity such as burning fossil fuels” said couples should factor in the effect of that warming on their children before having them. Meanwhile, 33% disagreed, and another third were neutral or didn’t know.

Older Americans were less likely to agree.

About 25% of respondents between the ages of 45 and 60 said climate change should be a consideration, while about 20% of those older than 60 years old said the same. About 47% of respondents older than 60 years old said climate change shouldn’t be a factor in the decision to have kids.