Working from an e-mail list of millions of voters who supported his presidential campaign, they will focus on putting pressure on Congress to approve his $3.55 trillion budget for 2010.
VOA: standard.2009.03.16
The development of e-readers and e-books created more pressure on the large stores.
Fracking involves the injection of water containing a surfactant and various other chemicals under high pressure into a source rock e.g. shale, causing the latter to fracture and release natural gas (principally methane).