The phrase "a cleaner and efficient" is not correct in written English.
It should be "a cleaner and more efficient" to maintain parallel structure.
Example: "We are looking for a solution that is a cleaner and more efficient way to manage our resources."
Alternatives: "a more effective and cleaner" or "a tidier and more efficient".
They are a roadblock on the way to a cleaner and more efficient energy future.
If I were, I would create a cleaner and more efficient public transport.
The new Democratic majority vowed to make these issues a top priority, President Bush spoke of ending America's addiction to imported oil and industry groups promised to do their share to build a cleaner and more efficient future.
Finally, the contribution comes from the results of analysis for justifying development of wind power in China as a cleaner and more efficient option.
If China wants to change the long-standing coal-dominated energy consumption structure to achieve a cleaner and more efficient development of the national economy, increasing natural gas consumption is the most realistic and scientific choice (Ma and Li 2010).
China's drive for a cleaner and more efficient energy grid received a boost in April when the Chinese government issued four documents on power sector reform.
A joint statement from President George W. Bush and Prime Minister Manmohan Singh about the pact that year included a promise to safeguard the environment, but hailed reactors as a way to meet "global energy demands in a cleaner and more efficient manner".
"But sane people will disagree with him because they will be aware of the evidence that the risks of climate change can be managed through the creation of a cleaner and more energy efficient world powered by alternatives to dirty fossil fuel plants".
Companies are investing in finding both a cleaner and more energy efficient manner of extracting the oil sands.
This leads to a significant step forward with respect to the nowadays options in terms of sustainable process management, that drives towards a cleaner and more energy-efficient future.
