To some extent, this helps the ecosystem. In excess, any one species can toss the system out of balance.

this being said, can you think of a single animal whose acts do not tamper with the environment? But that’s part of the ecosystem.

there may just be too many of us, and we may be trying to do too many things.

Plants adore my carbon dioxide. They like it so much, they give me oxygen in return. Completely ‘at peace’ with the environment.

To understand how to increase photosynthesis, you must first know it’s atomic equation 6(CO2)+6(H2O) –energy–> C6H12O6+6(O2)

Now that we know that, there are a few conditions that are required for photosynthesis to take place. One mistake someone in a greenhouse might make, is starving their plants of CO2. All animals exhale CO2, so an easy solution is allowing animals into the greenhouse or venting the greenhouse so it can get enough CO2.

The next important ingredient is H2O. H2O is simply water, so what you need to do is give sufficient amounts of water to the plants. Not all plants require the same amount of water. You should probably find out the recommended amount of water to give each of your plants.

Now, the energy that is in the equation for photosynthesis is light from the sun. Light from the sun is collected in what’s call chlorophyll or chloroplast. Chlorophyll is what gives the plant it’s green pigment. The chlorophyll reacts by absorbing all colors but green. When it reflects the color green, it allows you to see it.
http://www.benbest.com/nutrceut/chlorophyll.jpg
That’s the chemical formula for chlorophyll. As you can see, it’s atomic structure consists of more than just Hydrogen, Oxygen and Carbon. It also requires Nitrogen and Magnesium.

Now you’re probably thinking, “Where in the world am I going to get Nitrogen and Magnesium?!”
Please, don’t fret. There is plenty of nitrogen to go around. Out air is full of it. In fact, our air is full of it. The only problem is that neither animal nor plant cells can use the available nitrogen. There is, in fact, a fungus that CAN use nitrogen and convert it to a use-able form for plants and animals. This fungus commonly grows on legumes, such as soy beans, and actually produces a Magnesium porphyrin that consists of four nitrogen molecules and one magnesium molecule. After growing legumes, Magnesium porphyrin is put into the soil and readily available for nitrogen stealing plants. This process is commonly called crop rotation, and many farmers use it in order to grow larger crops.

As you can see, the only ways to “speed up” photosynthesis are:
1) Supply sufficient amounts of CO2
2) Supply sufficient amounts of H2O (NOT TOO MUCH)
3) Supply sufficient amounts of Sunlight (NOT TOO MUCH)
4) Increase the number of chloroplast by growing legumes to enrich the soil with nitrogen.

If you increase these, then you can increase the photosynthesis of your plants. Light and nutrient increase, at the right balance for the plants type of growth: vegetative or flowering induction, is perhaps the easiest, using the appropriate mix, is easy. Greenhouses may also be heated, or have CO2 added to the environment, both of which plant growers do, to increase their yields. CO2 may of course be lost, due to leakage from the greenhouse.

So, it all comes down to cost in the end for most growers – what price they pay for energy, CO2 and fertilizers.

Improved insulation of a greenhouse can help increase warmth, with or without added heat.

Solar light can be used to produce a. electricity or b. warm water, which can then be used to, for a). convert to light or heat, or b). for heat. These can be the most cost effective ways to increase these elements. Otherwise, standard energy sources – electricity, gas etc. can be used for warmth. Electricity usage can be reduced, via use of energy efficient lighting and placement of lights closer to the plants, thereby increasing the effective light intensity received by them to photosynthesize at a higher rate. Also, as plants do not use all of the light spectrum to photosynthesize, growers also can use their energy solely to produce the light frequencies that are effective to increase growth/flowering and, for some crops, their fruiting. Often they will change the light type, during different stages of growth.

Just some basics covered to give you some insight. Growers will balance their costs in order to give themselves the most valuable investment for their return. (It is also possible to decrease photosynthesis, when too much heat is provided to plants.)

So, in summary, increase:
- the appropriate light frequency intensity,
- CO2 availability
- increase appropriate nutrient balance
- increase (subject to constraint) the ambient temperature.

Hope these thoughts help. Good luck!