I suppose "ecology" will be better.

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Note added at 2002-08-05 07:49:49 (GMT)
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Ecology is the scientific discipline that is concerned with the relationships between organisms and their past, present, and future environments.”


Source: Ecological Society of America

Or science of environment. It is a straightforward translation, with over 1 million entries in Google.

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Note added at 2002-08-05 12:44:16 (GMT)
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First, there is rarely ONE CORRECT answer. For example, I majored in political science but it was called ¥"Government.¥" The same point can be made about political economy and economics, commerce and business, etc. This is particularly true now that most fields of study must be fully interdisciplinary.
Second, there are 231 entries on ¥"environmentology¥" in Google, of which about nearly one-third are from Japan (a smile comes to my face), and there are five entries on ¥"environtology¥" including one in German. There are 2,490,000 entries on ¥"environmental science.¥" Although Google is not a god, this is one aspect of the reality of word usage.
Third, to a layman, it seems the connotation of environmentology is a bit narrower (dealing a lot with relaxation, medicine, etc.) than enviromental science, whereas 情報学 to me is as broad in meaning (perhaps including humanities and social sciences more) as 情報科学. My tentative conclusion: ¥"environmental science¥" is more appropriate for 情報学 in most situations than ¥"environmentology¥" because it is broader in meaning, and is used and understood far more universally (by a 231 to 2,490,00 lead). Environmentology is more appropriate, I infer, in a specifi range of areas.


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Note added at 2002-08-05 12:54:34 (GMT)
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In a nutshell, the term ¥"environmental science¥" (or environmental sciences) appears to be broad enough in its meaning and fluid enough in its development to encompass both 情報科学and 情報学。

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Note added at 2002-08-06 05:16:46 (GMT)
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¥"Environmental Studies¥" (or Environmental Study)も素晴らしい。 異論はまったくございません。

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Note added at 2002-08-06 07:14:43 (GMT)
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¥"Environmental Studies¥" も　240万件以上Googleに載っていますね。　３００件の方が正しいことも十¥分ありえますが｡

After reading everyone¥'s comments and a little additional searching I have come up with the following conclusion:

1) S<caron>ﾂ境科S<caron>w -- environmental science is the study of the environment with a focus on the use of scientific method and discovery.

2) S<caron>ﾂ境S<caron>w -- environmental studies (please note the plural) are a program of study that includes various approaches to understanding the environment. These approaches include both scientific and non-scientific method, such as art, history, and literature. (See URL below.)

3) environmentology is a substitute word for environmental science and should probably be avoided where rigour is required. By way of example, some people believe that astrology is a science most others would disagree.

Caution: there is a tendency among Japanese to overuse latin derivatives in English. For example, the suffixes ¥"-ism¥" and ¥"-ist¥", which translate into Japanese as -Z<caron>蜍` and -Z<caron>蜍`Z<caron>ﾒ are often abused by Japanese. The terms environmentology and environology are reminiscent of such abuse.

Finally, I would like to offer special thanks to Yoshiro for setting me on the right track with regard to the use of -科S<caron>w and -S<caron>w.