POWER OF ATTORNEY

I, the undersigned officer of Calvert Global Water Fund ("Fund"), hereby constitute Lancelot A. King and Ivy Wafford Duke my true and lawful attorneys, with full power to each of them, to sign for me and in my name in the appropriate capacities, all registration statements and amendments filed by the Fund with any federal or state agency, and to do all such things in my name and behalf necessary for registering and maintaining registration or exemptions from registration of the Fund with any government agency in any jurisdiction, domestic or foreign.

The same persons are authorized generally to do all such things in my name and behalf to comply with the provisions of all federal, state and foreign laws, regulations, and policy pronouncements affecting the Fund, including, but not limited to, the Securities Act of 1933, the Securities Exchange Act of 1934, the Investment Company Act of 1940, the Investment Advisers Act of 1940, the Internal Revenue Code of 1986, and all state laws regulating the securities industry.

The same persons are further authorized to sign my name to any document needed to maintain the lawful operation of the Fund.

WITNESS my hand on the date set forth below.

June 23, 2008	/s/ Barbara Krumsiek
Date	Signature
/s/ Andrew Niebler	Barbara Krumsiek
Witness	Name of Director
Andrew Niebler
Witness Name (Printed)

POWER OF ATTORNEY

I, the undersigned officer of Calvert Global Water Fund ("Fund"), hereby constitute Lancelot A. King and Ivy Wafford Duke my true and lawful attorneys, with full power to each of them, to sign for me and in my name in the appropriate capacities, all registration statements and amendments filed by the Fund with any federal or state agency, and to do all such things in my name and behalf necessary for registering and maintaining registration or exemptions from registration of the Fund with any government agency in any jurisdiction, domestic or foreign.

The same persons are authorized generally to do all such things in my name and behalf to comply with the provisions of all federal, state and foreign laws, regulations, and policy pronouncements affecting the Fund, including, but not limited to, the Securities Act of 1933, the Securities Exchange Act of 1934, the Investment Company Act of 1940, the Investment Advisers Act of 1940, the Internal Revenue Code of 1986, and all state laws regulating the securities industry.

The same persons are further authorized to sign my name to any document needed to maintain the lawful operation of the Fund.

WITNESS my hand on the date set forth below.

June 23, 2008	/s/ William M. Tartikoff
Date	Signature
/s/ Andrew Niebler	William M. Tartikoff
Witness	Name of Director
Andrew Niebler
Witness Name (Printed)

POWER OF ATTORNEY

I, the undersigned officer of Calvert Global Water Fund ("Fund"), hereby constitute Lancelot A. King and Ivy Wafford Duke my true and lawful attorneys, with full power to each of them, to sign for me and in my name in the appropriate capacities, all registration statements and amendments filed by the Fund with any federal or state agency, and to do all such things in my name and behalf necessary for registering and maintaining registration or exemptions from registration of the Fund with any government agency in any jurisdiction, domestic or foreign.

The same persons are authorized generally to do all such things in my name and behalf to comply with the provisions of all federal, state and foreign laws, regulations, and policy pronouncements affecting the Fund, including, but not limited to, the Securities Act of 1933, the Securities Exchange Act of 1934, the Investment Company Act of 1940, the Investment Advisers Act of 1940, the Internal Revenue Code of 1986, and all state laws regulating the securities industry.

The same persons are further authorized to sign my name to any document needed to maintain the lawful operation of the Fund.

WITNESS my hand on the date set forth below.

June 25, 2008	/s/ Ronald Wolfsheimer
Date	Signature
/s/ Traci Lynn Goldt	Ronald Wolfsheimer
Witness	Name of Director
Traci Lynn Goldt
Witness Name (Printed)