"You have to compromise, you can't be rigid … you have to bend," Begley says, jokingly. "I'm not a dictator."
On "Living with Ed," Begley gives his wife a hard time about the length of her showers.
"Honey, do you know how long you have been in there in the shower? Fourteen minutes you have been in there, 285 gallons now."
Funny, yes, but these guys believe what they are doing is seriously important.
"We're just trying to change the world. That's all," says Nye. "So I'd say it's important. The strangest thing, the hardest idea to get about climate change is everything you do affects everybody."
"I think people are starting to see the connection," says Begley, "between their actions and pollution, their actions and our dependence open Middle East oil, their actions and big-ticket items like global climate change."
Begley and Nye wouldn't tell us exactly how much they invested in their homes, but it's easily in the tens of thousands of dollars. Is this a lifestyle that the average American could replicate, or is it a Hollywood trend?
"There are many things that are available to people of low income," says Begley.
"I'm no millionaire," he adds. "I wasn't when I put the solar panels in in 1990. I've never been a millionaire, but I have an income that allows me to do these things. And if people who have the means do it … it's going to create a good marketplace, and it will get cheaper for all of us."
That is part of the evolution of the environmental movement: not focusing just on saving the planet, but saving a buck. This "keeping up with the Begleys" helps deliver the message, but Begley and Nye won't go so far as to say that they're hip.
"Let's not get carried away," says Begley. "But we can show people they can still have a cool beverage and a warm shower. We're just going to do it more efficiently."
"You save money -- what's not to love about that?" says Nye.
The latest standoff involves wind turbines. Nye came home one day and saw a turbine installed on Begley's garage. So, Nye has ordered his own. One that is even more efficient than Begley's.
Begley's daughter Hayden is in favor of the competition.
"I like it because my daddy is winning," she says.
"You don't have little blond children to speak for you?" Begley asks Nye.
"No," replies Nye, "especially none that are so well coached."