Sentence examples for forms of coal from inspiring English sources

They demand vastly more efficient cars and trucks, as well as more benign forms of coal, the world's most abundant fuel.

By 2030, the cost of solar should be comparable to that of even the dirtiest forms of coal, and of gas, said Ajay Gambhir, of Imperial College London.

On its face, UCG looks like a big improvement over mountaintop removal and other forms of coal mining, but it comes with its own set of environmental risks.

He said anthracite was poised to make a broader comeback as the price of oil had made all forms of coal more competitive.

Pulverized coal firing has many advantages over other forms of coal firing and makes burning coal similar to oil firing from a process viewpoint.

But what makes this brittle and lustrous rock, often known as black diamond, so hard and pure is that it is often deeper and under greater pressure than other forms of coal, which also explains why it is expensive and dangerous to extract.

"China epitomizes the stark choices that we face globally in moving away from current forms of coal-based electricity," said Jonathan Sinton, the top China specialist at the International Energy Agency in Paris.

It has long been known that the Lehigh Valley's soot-shrouded landscape — pocked with the dark forms of coal-breaking towers and steel mills, and rived by railroad tracks, trestle bridges and speeding steam locomotives — left an indelible mark on Kline's art.

Additionally, the morphology of chars from different forms of coals were observed using scanning electron microscope (SEM).

The volatilization of Na was at different extents for different forms of coals at different gasification temperatures in steam.

Figure 4 shows the specific surface area and pore volume for the chars from different forms of coals at different temperatures.