Powerful ocean heat pulses of the kind we observe now, when combined with an extraordinary human greenhouse gas heat forcing, also increases the likelihood of another record warm year. (robertscribbler.com)
But hydrogen is commonly produced from natural gas heated by steam, which results in greenhouse gas emissions and other environmental problems. (scientificamerican.com)
The need to regularly replace oil filters also adds to annual maintenance costs, which can be as much as two to three times higher than for gas heating systems. (rismedia.com)