The phrase "and thereby decrease" is correct and usable in written English.
It can be used to indicate that one action leads to a reduction in something else, often in a cause-and-effect context.
Example: "Implementing these changes will improve efficiency and thereby decrease operational costs."
Alternatives: "and thus reduce" or "and consequently lower".
On Social Security the president has proposed changing the way that cost of living is calculated, to a formula that would produce lower estimates of what seniors need to live on and thereby decrease their benefits.
I work at a hospital where several nurses practice therapies like healing touch and therapeutic touch, said to adjust a patient's energy field and thereby decrease pain and improve healing, although there is no significant evidence for this.
We hypothesized that intra-arterial administration might, unlike intravenous administration, induce sustained renal vasoconstriction and, thereby, decrease GFR.
Prescribed fire is commonly applied to reduce fuel loads and thereby decrease future fire risk to life and property.
Methods to uniform the load distribution and thereby decrease the stress concentration factor are tested with the analytical model.
However, not all previous lean projects have reduced waste, and thereby decrease costs as it was assumed.
Though the two seem unrelated, advocates of universal coverage argue that providing coverage will nearly eliminate uncompensated care and thereby decrease premiums.
Secondly, additional information on future market conditions may interfere with the operation of risk-sharing markets and thereby decrease ex ante expected utility and production levels.
The receptors are coupled to G-proteins which inhibit adenylate cyclase and thereby decrease intracellular cyclic adenosine monophosphate (cAMP) [16 19] (see Fig. 6).
As a result, TCP PR, RR TCP, and TCP DOOR frequently reduces the size of cwnd and thereby decrease the throughput performance.
It is likely that protons will then compete with metal ions for ligands and thereby decrease the interaction of metal ions with the cells [18].
