Mining companies have long been a big contributor to climate change.
As a result, the U.S. and its coal-mining competitors have spent billions of dollars to protect their assets.
The mining industry has spent over $50 billion to prevent climate change and clean up the air and water around the country.
But now it appears that the mining industry is also contributing to the CO2 pollution problem.
While mining companies have been fighting efforts to curb climate change for decades, it seems the industry may be moving to address climate change through new ways of mining.
In the meantime, mining companies are investing heavily in new technologies to help address the problem.
As the coal industry moves towards more renewables, coal mining is moving into the mining of natural gas, a gas which has a much lower impact on the environment.
Natural gas, as it is now known, is the third most abundant gas on Earth after coal and oil.
Natural Gas is also cleaner than coal, so it has been considered a more environmentally friendly option to mine.
The new technologies that are developing to deal with the pollution problem are already being used to mine natural gas and natural gas-fired power plants, as well as some coal-fired plants.
These technologies, which can operate with no emissions of CO2, include horizontal drilling, horizontal transmission, and underground storage of natural gases.
However, some of these technologies also have some downsides.
While these technologies are still relatively new, some are now being used in coal- and natural-gas-fired energy production.
The downsides include a huge amount of waste and CO2 release, as methane escapes from underground gas storage tanks.
The gas that is released is also more dangerous to the environment than coal- or natural-sourced methane.
While natural gas production has been growing rapidly, it is expected that natural gas will continue to increase in importance in the future.
While the natural gas industry has been a significant contributor to reducing CO2 in the atmosphere, some experts think that it is likely that more coal-based power plants will be needed to keep pace with the growth in natural gas.
The natural gas sector is now the fourth largest coal-burning industry in the United States.
Coal mining companies invest a lot of money in environmental protections, including protections for the environment and air quality, and they have been trying to address the pollution problems.
While many of the technologies being used today are used to make natural gas safer and cleaner, some also have a downside.
Coal companies are also spending a lot more money to protect themselves from the negative impacts of climate change than they do to reduce CO2.
The cost of protecting coal mining companies from the climate change problem will increase as the economy improves, and coal mining can still have a huge impact on climate change pollution.