Chemistry is such a broad discipline that chemists tend to specialise in particular parts, such as physical, analytical, organic, inorganic, environmental and industrial chemistry or in chemical engineering. Such specialisation usually starts during university training of chemists and develops further during on-the-job training and with professional experience.
Many chemical problems in the real world require expertise from more than just one branch of chemistry. This is particularly true in industry where the production of a particular product can require detailed knowledge of physical chemistry (equilibrium and rate considerations), organic chemistry (how the reaction occurs and how to optimise yield), analytical chemistry (to monitor quality of raw materials and the product), industrial chemistry or chemical engineering (to be able to 'scale up' a laboratory experiment to industrial production quantities with inherent problems of energy inputs or outputs and mass flows and materials to use for safe handling) and environmental chemistry (to appreciate the significance of possible wastes and how to manage them in an environmentally responsible way). Solving such broad-ranging and complex problems requires input from many chemists with different specialties, and they cannot solve their aspect of the problem in isolation: it may have implications for other aspects being handled by other chemists. Therefore it is essential that chemists work collaboratively, regularly talk to one another and exchange their different viewpoints about problems as they arrive.
This need to collaborate means that chemists must have good communication skills V that they are able to communicate essential aspects of their particular sub-disciplines to others not expert in the same fields without using too much specialised jargon.
In addition the ability of chemists with different backgrounds to see problems in different lights V that is to bring different perspectives to the problem V can often lead to quicker and more effective solutions than one chemist working alone with quite restricted experiences and viewpoints.
In the environmental field collaboration between scientists (not just chemists) is even more important for the efficient solution of problems. Environmental problems often require input from chemists (who do analysis), microbiologists (who monitor organisms), botanists and horticulturalists (who can identify problems for flora and crops), ecologists (who oversee the interrelationships between organisms, plants and animals), geologists (who can determine the effects of constructions and earth-moving), hydrologists (who study changing water-flow patterns) and engineers (who design and supervise the construction of major works). As the work of one scientist or engineer has consequences for other areas of science or the environment, it is essential that all professionals involved work in close collaboration and talk to each other on a frequent and regular basis. And again good communication skills with the avoidance of excessive technical jargon is essential.
hope this helps.