It depends to the countries and what resources they have. Some alternatives to coal energy could be using oil, gas and even atomic energy in some cases.
Is natural gas fossil fuel
gas, diesel and electricity Ethanol, natural gas, propane,
Wells and cisterns are alternatives to aqueducts.
Some sustainable alternatives to petroleum in various industries include biofuels, such as ethanol and biodiesel, which are made from renewable resources like plants; hydrogen fuel cells, which produce electricity through a chemical reaction with hydrogen gas; and electric vehicles powered by renewable energy sources like solar or wind power. These alternatives can help reduce greenhouse gas emissions and dependence on fossil fuels.
CNG- Compressed Natural Gas.
solar
Weber gas grills are a little cheaper and even still, probably better quality. For real grilling flavor, go even cheaper and get a charcoal grill, the taste cannot be matched by gas!
There are some other alternatives to rubbish removal than relying on city trash workers. Some of these alternatives are composting, recycling, and donating.
Some alternatives of "cultivate" could be nurture, develop, foster, or promote.
Aegon corporation provides an extensive line of life insurance products. There are many alternatives to Aegon if you look. Metropolitan Life and Liberty, are some alternatives.
Some popular free alternatives to Spam Killer include Spam Fighter and Mail Washer. Some other alternatives are Spam Fence and Bull Guard Spam Filter.