March 13 — About 25 percent of companies have already invested in on-site generation with solar power and co-generation which combines heat and power, according to a survey of about 1,000 companies by  Centrica, the British-based company that owns Direct Energy, the third biggest seller of electricity in Texas. Another 32 percent are planning to invest in solar power during the next two years while 30 percent are considering co-generation investments in combined heat and power.

— Houston Chronicle