The phrase "an efficient natural" is not correct and does not convey a clear meaning in written English.
It may be intended to describe something that is both efficient and natural, but the phrasing is awkward and lacks clarity.
Example: "The design of the product is an efficient natural solution to the problem of waste."
Alternatives: "a naturally efficient" or "an effective natural".
An L.E.D. light, powered by an efficient natural gas turbine, converts 20 percent of the total energy to light— a 20-fold increase".
Forest stands are an efficient natural protection solution against rockfall.
In the second phase, the output subsidy is altered to be uniform across assets and based on the emissions intensity of an efficient natural gas asset.
hysteretic module, we assess the processes influencing the quantity of mobile CO2 within the leaking plume and perform a sensitivity analysis to point out the key-parameters and conditions for an efficient natural trapping by dissolution and residual trapping.
Photovoltaic energy generation is envisaged as an efficient, natural and valuable energy source not only for outdoor but also for indoor applications, even if it is often difficult to give an adequate description of the indoor illumination conditions, and till now no (international) norms regulate the characterization of solar cells under the particular indoor conditions.
RBP is an efficient natural antioxidant.
ICCU is keen to develop a more efficient and environmentally friendly power supply, and the Archer-Trice engine could provide a solution.The firm is investing several million euros in the project, and within nine months it hopes to use the Archer-Trice design to produce an efficient, natural-gas-fuelled generator capable of powering 1,000 homes.
This functional integrity is promising in terms of further research into the properties and applicability of this photo excitable semiconductor biophotonic material containing the photosynthetic reaction center, an exceptionally efficient natural light harvesting system.
Although I'm no expert on the environmental consequences, it seems to be a reasonably efficient, natural, chemical-free solution to a serious problem.
It has already adopted basic practices, like turning off lights and computers when they are not needed, and is now working to replace its oil furnace with a more efficient natural gas one.
The antioxidant properties of PhA have also been shown to inhibit free radical formation and lower lipid peroxidation, making it a very efficient natural food and feed preservative [ 9].
