Matched context for environment and efficiency

The page lists matched contexts for environment and efficiency.

Share - environment	Share - efficiency	Phrase
0.45%	2.89%	combustion {environment or efficiency}
0.48%	2.59%	engine {environment or efficiency}
0.91%	1.59%	high [size] {environment or efficiency}
0.30%	5.09%	improve {environment or efficiency} [perform operation]
1.82%	0.67%	operating [functioning] {environment or efficiency}
0.39%	2.74%	thermal [temperature] {environment or efficiency}
0.24%	1.30%	effect on {environment or efficiency}
0.15%	0.34%	exhaust [physical/chemical] {environment or efficiency}
0.21%	1.12%	fuel {environment or efficiency}
0.12%	0.24%	gas {environment or efficiency}
0.39%	0.39%	low [size] {environment or efficiency}
0.35%	0.36%	maintain {environment or efficiency} [perform operation]
0.45%	0.20%	operating [functioning] {environment or efficiency}
0.42%	0.23%	operational [functioning] {environment or efficiency}
0.52%	0.33%	provide {environment or efficiency} [perform operation]
0.14%	0.52%	system {environment or efficiency}