Environmental lifestyle site Lime has launched an ad network of similarly green-focused sites, reports MediaWeek (via MarketingVOX).

Sites such as SavvyVegetarian, EcoGeek and others were chosen for how well they fit with the Lime philosophy. Lime founder C.J. Kettler says that brand extension has always been in his plans.

Advertiser interest in reaching green consumers is high. Spending on environmentally-responsible goods and services is estimated at $230 billion.