Unless you live in the tropics, electric heat is borderline unconscionable with regards to climate change.

Why is that? Your electricity might be from renewable resources. Or a non-renewable that is more efficient in total than using gas directly.

My choices are grid, solar, propane. I only use propane as emergency power backup.

I use solar power. Also, in nearby San Jose, California, they have banned NG in all new construction except commercial or multi family residences taller than 3 stories.

what's the conscionable alternative?

Wear a sweater.