Houston—The energy industry is still reeling from low oil prices but Alexander Rozenfeld is placing a bet that this is the right time to back innovative ideas in the sector.

Rozenfeld left his position as president of Shell Technology Venture to form his own venture firm, Climate Impact Capital. The past several years have not been kind to venture investors in cleantech and energy, as well as food, water, and other environmentally focused segments. Still, Rozenfeld says he believes that taking a longer-term approach to cleantech investing will prove to be successful.

“We’ve been talking about this for a long…