Not enough for the Basel Action Network, a Seattle group monitoring the toxic waste trade, which alleges that companies like ReCellular are shifting toxic waste to nations that aren't equipped to deal with its eventual disposal.
Low cost improvements can include replacing incandescent lights with CFL or LED alternatives, master switches to make it easier to switch off appliances at night, energy monitoring to make it easier to identify waste, draft proofing, and using plants or shade-cloth to keep the summer sun off your home.