Sentences with phrase «limited number of plants»

It has to do with the difficulty of obtaining the color itself, since a limited number of plants and insects have naturally produced the pigment.

But this only works in the limited number of plants that are natural hosts to the bacterium.

Not exact matches

In Natal the capsicum plant grows in perfection, and yields a profit to a limited number of growers.

WHEREAS, limiting the number of rounds to seven versus ten is arbitrary and capricious; has no correlation to public safety, unfairly burdens law - abiding gun owners; and puts an undue burden on gun manufacturers to retool their manufacturing plants; and

Such so - called nonvascular plants would have been able to exploit only the limited number of environments that were constantly damp, the researchers note.

Those plants pass on enough energy to sustain a limited number of insects, which in turn supply food for the occasional reptile or bird, all of which ultimately feed the bacteria.

Some of those studies predicted extinctions because growing herbivore populations would reduce the number of plants, limiting resources available to pollinators.

«The wild ancestors of C4 crops are thought to have grown as individuals in open habitats where the number of leaves that they produced would have been limited by water and nitrogen and most leaves would be exposed to full sunlight» said principal investigator Steve Long, Gutgsell Endowed Professor of Plant Biology and Crop Sciences at the University of Illinois.

«It was a massive rule that covered power plants all over the country... the court only gave a limited number of words to those challenges,» he said.

In addition to the potential passenger dangers, he says that pilots could only fly a limited number of flights to prevent overexposure to nuclear radiation, noting that after a few flights, they would have been exposed to far more radiation than nuclear power plant workers.

This focus on the potential ecological effects from pharmaceuticals largely began as a result of a growing number of technical papers published from the late 1990s until the present that have reported the detection of low levels of pharmaceuticals in wastewater treatment plant effluent, manufacturing plant effluent and surface water and, to a more limited extent, groundwater, drinking water, soils, and sediment.

Unlike its peers, which all have limited duration coping periods, requiring water make - up after a specific number of hours or days, the SMR - 160 plant is designed to remain passively cooled indefinitely, without requiring any operator activity.

This shift, coupled with limited ozone monitoring in most developing nations, has left a number of fundamental outstanding questions: Which regions of the world have the greatest human and plant exposure to ozone pollution?

How a large number of plant species can successfully coexist while competing for space and limiting resources has puzzled ecologists for decades.

In fact, according to the Environmental Protection Agency, 72 percent of all toxic water pollution in the country comes from coal - fired power plants, making coal plants the number one source of toxic water pollution in the U.S. (1) What's more, four out of five coal plants in the U.S. have no limits on the amount of toxics they are allowed to dump into our water.

«Too many [PhD] students are graduating for a limited number of professor positions with minimal training for careers outside of academic research,» noted Don Gibson, a PhD candidate studying plant genetics at UC Davis.

To show off its new Rocket V8 power plant, the factory produced a limited number of hoods with Plexiglas inserts.

Strictly limited production run of 500 individually numbered vehicles The RS500 marks the end of production for the current generation Focus RS, with the last vehicles scheduled to leave Ford's Saarlouis Assembly Plant in Germany during September 2010.

You can also apply some preventative routines such as rinsing your dog's feet when he returns from playing outside, and limiting the number of house plants you own.

The paper also cites a number of modelling and empirical papers that are of relevance to your questions, like Pagani, M., Caldeira, K., Berner, R. & Beerling, D. 2009 The role of terrestrial plants in limiting atmospheric CO2 decline over the past 24 million years.

ACEEE's latest report, Trailblazing Without the Smog: Incorporating Energy Efficiency into Greenhouse Gas Limits for Existing Power Plants, makes a number of recommendations regarding how these regulations should be structured so that the benefits of end - use energy efficiency are realized.

States can draw from a number of options, including joining or starting a cap - and - trade program, which sets limits on emissions, then allows for the purchase and sale of pollution permits; boosting their share of renewable energy in electricity generation; and tightening efficiency standards on plants and energy users.

Plaintiffs, led by the Electric Power Supply Association (EPSA), argued that ZECs preempt the FPA because they are «tethered» to wholesale auctions; and, that ZECs violate the dormant Commerce Clause because they are only offered to a limited number of in - state nuclear facilities, disadvantaging out - of - state nuclear plants.

Stricter environmental controls to reduce carbon emissions across the globe have resulted in a rising number of coal plants retiring early and have limited the feasibility of opening new coal power plants.

This is because we estimate that under this scenario a 50 % - efficient gas plant would most likely have to displace even the very limited number of 46 % - highest - efficiency coal plants, and also the 43 % - highest - efficiency lignite plants.

Reductions in the number of days with suitable climate conditions for plant growth also underscore an internal discrepancy of Earth System Models: while these models project dramatic enhancements of NPP [5,20,36], our results show multiple climate variables becoming limiting for plant growth, particularly in tropical areas, which could result in considerable reductions in future NPP (S4 Fig).

The unprecedented rate and number of climate variables becoming limiting for plant growth could challenge the capacity of species to adapt, with the potential to negatively impact terrestrial ecosystems and trigger climate feedbacks.

Consideration of an upper thermal limit and interactions with plant growth thresholds in additional climatic variables resulted in the opposite trend: global decreases in the number of suitable plant growing days by 2100 (Fig 2).

Our assumption is that the limited number of nuclear power plants now under construction worldwide will simply offset the closing of aging plants, with no overall growth in capacity by 2020.

That people were able to get by at all on such limited water and food resources (and as it happens they seem to have done much better that might at first be expected) was because their numbers, like those of the plants and animals they relied upon, were relatively few — as low as one person per 100 square kilometres, or even lower still.

Limit the size and number of these sections by using drought - tolerant plants to surround the areas of turf.