The group organizes homeowners into collective solar purchasing groups, and negotiates significant discounts accordingly.

这个组织引导居民团体购买太阳能，集体谈判赢取大额折扣。

youdao

In some cases, collective purchasing of raw materials can help reduce costs.

ECONOMIST: Italy's business clusters

The San Francisco-based organization founded by Brent Schulkin organizes campaigns that harness the collective purchasing power of consumers to incentivize companies, big and small, to become more socially responsibile.

FORBES: Is Trust Being Replaced By Reputation?